how to prevent callback hell
TRANSCRIPT
How to PreventCallback Hell
Tianyu ZHAO
Self-IntroductionFrom ChinaJoined Drecom 1 year agoRails Developer
What is callback hell?
Why should we deal with it?
Hard to Understand
How to avoid this?
Name your functions
Define new functions
Use Promise object
Use Promise objectCreate custom getJSON function
Use Promise objectUse custom getJSON function
Use Promise objectDon’t have to do that at all (Deferred Object in jQuery 1.8+)http://api.jquery.com/category/deferred-object/
Use Promise + Generator
What’s Generator?
Use Promise + Generator
More about Promise
Use Promise + Generator
More about Promise
Use Promise + Generator
Cool Library: co (https://github.com/tj/co)
yield Promise
Use Promise + Generator
Cool Library: co (https://github.com/tj/co)
Promiseresolver
resolverGenerato
r.next()
Promiseresolver
ConclusionCallback hell is kind of the feature of JavaScriptSome people like it, some people don’t like itDecide how to handle it by oneself (simply name functions or use Promise + Generator)
Thank you!